RU2597063C2 - Method for designing modifications of coaxial gearbox with two clutches - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: invention relates to automotive industry, particularly to automated transmissions. Gearbox with two clutches includes a housing with a coaxial input and output shafts and intermediate shaft which is parallel to them. Two input shafts are fitted one into another, one supporting the gears of even gearing and another - the gears of odd gearing. Output and intermediate shaft gears are rigidly fitted thereat to make a gear set. Output shaft and solid input shaft are connected by connection coupling. Input shaft gear is engaged with a gear, rigidly coupled with extra solid or tubular shaft and connected by one coupling connection with two gears fitted on extra shaft and engaged with gears of the other input shaft.

EFFECT: higher degree of unification, lower costs of production and repair.

1 cl, 6 dwg

Description

The invention relates to transport machinery, in particular to automated transmissions.

A known gearbox with two multi-plate clutches, containing two coaxial drive shafts located one inside the other, with even and odd gears mounted on them, engaged with permanent gears of the corresponding gears, which can be rigidly connected using synchronizers with driven shafts ( Ivanov A.N., Solntsev A.N., Gayevsky V.V. et al. Fundamentals of the design of a car. - M.: “Publishing House” LLC “At the Wheel” ”, 2005. - 166 pp., Ill.).

In modern automotive gearboxes (KP) with two clutches, mainly gears with constant gearing are used. Often, modern cars, different in their intended purpose, are equipped with the same engines and gearboxes. For example, in one embodiment, the car can be used in a cargo version, in another - in a cargo-passenger one, and in the third one it has an all-wheel drive transmission with a passenger version. An example is a Volkswagen transporter. Or a car of one model can be equipped with engines with a significant difference in power (BMW-5). Or one car modification has a four-wheel drive transmission, and the other all-wheel drive (Audi A6). Thus, promising gearboxes for solving a larger number of operational tasks should be able to modify, in particular, increase the number of gears and (or) change the gear ratio of the first and (or) last gear. At the same time, providing for the possibility of using the gearbox in technically different (mono or all-wheel drive) transmission options, as well as providing the maximum possible unification between different modifications of the gearbox.

A known method for producing modifications of a 7-speed gearbox with two clutches (see patent DE 10253259 A1, dated 05.27.2004).

The method consists in obtaining various variants of mono-or all-wheel drive transmissions with a 7-speed gearbox with two clutches, consisting of a double clutch assembly, a housing with an output shaft parallel to it and two coaxial input shafts located one inside the other, rigidly mounted on one of which (a tubular shaft) reverse gears and three even gears, and on the other - four odd gears. Between the pairs of gears of the respective gears, four three-position synchronizers are installed.

The disadvantage of this method is the use of only one modification in terms of the number of gears, namely, a 7-speed gearbox. That is, the need to use a gearbox with a number of gears other than 7 for the given variety of transmission options is not taken into account.

The aim of the invention is to obtain a method for modifying a gearbox with two clutches (base gearbox) for technically different transmission options, which allows to increase the number of gears and (or) change the gear ratios of the “extreme” (first and (or) last) gears and reverse gear, then have the following modifications:

1 - base gearbox with additional lowering and accelerating gears,

2 - base gearbox with additional acceleration gear,

3 - base gearbox with additional reduction gear,

4- base gearbox and its modifications with an increased gear ratio of reverse gear.

This goal is achieved by the fact that a gear is engaged with the gear of one input shaft, which is rigidly connected with an additional, integral or tubular shaft and which is connected by at least one clutch with two gears freely mounted on the additional shaft and coupled to the gears of another input shaft.

The analysis of patents, scientific and technical literature did not reveal the fame of the claimed combination of existing features.

Considering as a prototype a method of obtaining modifications of a 7-speed gearbox with two clutches, taking into account the above disadvantages and eliminating them, in the framework of this invention we obtain a basic, for example 7-speed gearbox, and its modifications will be obtained using additional down and up gears . At the same time, while maintaining the possibility of using gearboxes in technically different (mono or all-wheel drive) transmission options. And also, to unify all the KP modifications obtained in the framework of this invention, reverse gear with an increased gear ratio is used.

In FIG. 1 shows a kinematic diagram of a 7-speed coaxial gearbox with two clutches (base gearbox). Bright lines indicate the details of the KP participating in the modification proposed by this invention, and the rest of the details of the base KP with pale lines. They are not considered in this invention and correspond to the prior art.

In FIG. 2 shows the radiation diagram of the base CP. On the horizontal are the numbers of the various gears and the gear ratios (u) are indicated. The vertical beam corresponds to a gear ratio of one. A beam pointing to the right indicates a deceleration. The more flat the beam, the greater the gear ratio. A beam pointing to the left indicates an accelerating gear.

In FIG. 3 shows a kinematic diagram of a modified base gearbox with additional downshifts and upshifts.

In FIG. 4 is a beam diagram of a modified base gearbox with additional downshifts and upshifts.

In FIG. 5 shows a kinematic diagram of a 9-speed gearbox according to the invention of the design, with an alternative arrangement and engagement of gears involved in the modification of the invention.

In FIG. 6 is a beam diagram of a 9-speed gearbox with an alternative arrangement and gearing of gears.

The composition shown in FIG. 1, a fragment of the kinematic diagram of a basic gearbox of interest in the framework of the present invention includes two coaxial input shafts 2 and 3 installed in the bearings of the housing 1, located one inside the other, an output shaft 4 coaxial with it and an intermediate shaft 5 installed parallel to them. Gear 6 is rigidly fixed on the input shaft 2. The gears 7 and 8 are rigidly fixed on the input shaft 3. The gear 8 is engaged with the gear 9 freely mounted on the intermediate shaft 5. The axis 10 is mounted parallel to the shafts in the housing 1. The rear gear block is mounted on the axis 10 Yes 11 and 12. Gear 11 is in constant engagement with gear 6, and gear 12 with gear 13, which is freely mounted on the intermediate shaft 5. Gear 14 is freely mounted on the input shaft 3 and engaged with gear 15, mounted on the intermediate shaft 5. Gears 16 and 17 are rigidly fixed on the intermediate shaft 5 and the output shaft 4, respectively. Clutches A (18) and B (19) are located on the intermediate shaft 5 next to gears 13 and 9, respectively. The clutch C (20) is located on the input shaft 3 between the gears 14 and 17. The driven disk 21 of the left clutch (L) is installed on the input shaft 3, and the driven disk 22 of the right clutch (P) is installed on the input shaft 2. A pressure device pressing the leading and driven discs when engaging clutches, not shown.

The composition shown in FIG. 3, of the fragment of the kinematic scheme of the modified base gearbox that is of interest in the framework of the present invention, the same details are included as in the composition of the base gearbox discussed above, and additionally: an additional shaft 23 is installed in the housing 1, on which the gear 24 is freely mounted, which is in constant meshing with gear 6. Gears 25 and 26 are freely mounted on the tubular shaft 27 and shaft 23, respectively, and engaged with gears 28 and 7, rigidly fixed to the input shaft 3. Clutch D (29) is located on the tubular shaft 27 between the gears 25 and 26. The tubular shaft 27 is freely mounted on the additional shaft 23 and is rigidly connected to the gear 24.

The operation of the base gearbox shown in FIG. 1 is carried out as follows.

1st gear.

We turn on the left clutch (L), switch the clutch B (19) to the right position. Torque from the input shaft 3 through the engaged gears 8-9, the clutch is transmitted to the intermediate shaft 5, a pair of gears 16-17 and the output shaft 4.

In the beam diagram (see FIG. 2), this transmission is reflected in series with the beams 0-I-1.

2, 3, 4, 5, 6 gears.

2, 3, 4, 5, 6 gears in the method of obtaining modifications of the KP, considered in this invention, do not participate, correspond to the prior art and are understood by a specialist.

On the radiation diagram (see Fig. 2), these transmissions are reflected in series by connected beams 0-II-2, 0-III-3, 0-IV-4, point 5.0-VI-6.

7th gear.

We turn on the left clutch (L), clutch C (20) in the left position. The torque from the input shaft 3 by the clutch C through the engaged gears 14-15 and the intermediate shaft 5, the engaged gears 16-17 is transmitted to the output shaft 4.

On the beam diagram (see figure 2) this transmission is reflected in series connected by beams 0-VII-7.

Reverse gear with increased gear ratio.

We turn on the right clutch (P), switch the clutch A (18) to the right position. The torque from the input shaft 2 through a pair of coupled gears 6-11, a block of gears 11-12, a pair of gears 12-13, clutch A is transmitted to the intermediate shaft 5, a pair of gears 16-17 and the output shaft 4.

On the radiation diagram (see Fig. 2), this transmission is reflected in series by the rays 0- (6-11), (12-13) -X.

The operation of the modified base gearbox shown in FIG. 3 is carried out as follows.

Reduction gear.

We turn on the right clutch (P), switch the clutches B (19) and D (29) to the right position. The torque from the input shaft 2 through a pair of interlocked gears 6-24, a tubular shaft 27, the coupling D is transmitted to a pair of interlocked gears 26-7, the input shaft 3 and further, similarly to the operation of the base gearbox in the first gear described above. On the radiation diagram (see Fig. 4), this transmission is reflected in series by the rays 0- (6-24) - (26-7) -Ι P-P.

1, 2, 3, 4, 5, 6, 7 gear and reverse.

They are carried out similarly to the above work of the basic gearbox in 1, 2, 3, 4, 5, 6, 7 gears and reverse gear.

Overdrive.

We turn on the right clutch (P), switch the couplings C (20) and D (29) to the left position. The torque from the input shaft 2 through a pair of coupled gears 6-24, a tubular shaft 27, the coupling D is transmitted to a pair of coupled gears 25-28, the input shaft 3 and then similar to the operation of the base gearbox in seventh gear, discussed above.

On the radiation diagram (see Fig. 4), this transmission is reflected in series by beams 0- (6-24) -VII U-U.

Using the proposed method for producing dual-clutch gearbox modifications allows us to solve a greater number of operational tasks on vehicles with technically different versions of mono or all-wheel drive transmissions. Namely, additional lowering and accelerating gears form from the basic, for example, 7-speed gearbox, two variants of 8-speed gearboxes and 9-speed gearbox. At the same time, to unify all options, reverse gear is used with an increased gear ratio. This extends the range of gear ratios of the gearbox, increases the operational capabilities and characteristics of the car. At the same time, most of the components and assemblies of the base and modified gearboxes remain unchanged, which ensures a high degree of unification and a reduction in production and repair costs.

The term "coaxial (basic) gearbox with two clutches" means existing or newly designed gearboxes to which the considered method can be applied within the scope of the claims. At the same time, the newly obtained modified KP can be in a single embodiment of the design, but with the indicated features, essential and interconnected, forming a stable set of essential features, sufficient to obtain a technical result.

List of sources

1. Ivanov A.N., Solntsev A.N., Gaevsky V.V. and others. The basics of car design. - M .: Book Publishing House LLC “Behind the Wheel”, 2005. - 166 p.: Silt,

2. Patent DE 10253259 No. 1, from 27.05.2004 g.

3. Patent RU 2481510.

4. Patent RU 2312031.

5. Cars: Design, construction and calculation. Transmission. Ed. A.I. Grishkevich. - Mn .: Vysh. school, 1985 .-- 240 p.

Claims (1)

A method of obtaining modifications of a coaxial gearbox with two clutches, comprising a double clutch assembly, a housing with coaxial input and output shafts located therein and at least one intermediate shaft parallel to them, wherein the two input shafts are coaxial and located inside each other with hard-mounted on one of them, even-gear gears, and on the other, odd-gear gears, with a reverse gear mounted on one of them, engaged with gears of a constant gear the gears of the respective gears, which can be rigidly connected by means of gear clutches with shafts, the gear of the output and gear of the intermediate shaft making up a gear pair and rigidly fixed to them, and the output shaft and the solid input shaft are connected by a clutch, characterized in that with the gear of one input a gear engages the shaft, which is rigidly connected to an additional integral or tubular shaft and which is connected by at least one clutch with two gears freely mounted on olnitelnom shaft and interlocked with the input shaft of another gear.

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